The British clean machine. The AC30's chiming, jangly top end and warm compression when pushed define the sound of The Beatles, Queen, U2, and Radiohead. The Top Boost channel adds treble and bass controls with a distinctive, glassy overdrive character.
The Celestion Alnico Blue chimes; the Greenback grinds. In a Vox AC30, that one speaker choice decides whether your worship tone sparkles or sits warm under the mix.
Almost every amp marketed as "Class A" isn't, including the Vox AC30. Here's what Class A and Class AB actually mean at the circuit level, which amps use which topology, and why the distinction matters more for feel than you'd expect.
The Cut knob is the AC30's most misunderstood control. It's not a tone knob. It works backwards from every other amp you've used. Here's what it actually does and how to set it.